DE102013103206B4 - Via structure and method - Google Patents
Via structure and method Download PDFInfo
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- DE102013103206B4 DE102013103206B4 DE102013103206.0A DE102013103206A DE102013103206B4 DE 102013103206 B4 DE102013103206 B4 DE 102013103206B4 DE 102013103206 A DE102013103206 A DE 102013103206A DE 102013103206 B4 DE102013103206 B4 DE 102013103206B4
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- H01L2924/13091—Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
Abstract
Vorrichtung, die aufweist:eine dielektrische Zwischenschicht (115), die auf einer ersten Seite (101) eines Substrates (102) ausgebildet ist;eine erste Metallisierungsschicht, die über der dielektrischen Zwischenschicht (115) ausgebildet ist, wobei die erste Metallisierungsschicht eine Mehrzahl Metallleitungen (184, 186) aufweist, die in einem ersten dielektrischen Zwischenmetallmaterial (182) ausgebildet ist; undeine Durchkontaktierung (142), die in dem Substrat (102) und der dielektrischen Zwischenschicht (115) ausgebildet ist, wobei die Durchkontaktierung (142) aufweist:einen Bodenabschnitt, der aus einem leitfähigen Material ausgebildet ist, wobei der Bodenabschnitt angrenzend an eine zweite Seite (103) des Substrates (102) angeordnet ist;Seitenwandabschnitte, die aus dem leitfähigen Material ausgebildet sind, wobei erste Endabschnitte der Seitenwandabschnitte mit dem Bodenabschnitt verbunden sind, und wobei zweite Endabschnitte der Seitenwandabschnitte mit den Metallleitungen (184, 186) der ersten Metallisierungsschicht verbunden sind; undeinen Mittelabschnitt, der zwischen den Seitenwandabschnitten über dem Bodenabschnitt ausgebildet ist, wobei der Mittelabschnitt aus einem dielektrischen Material ausgebildet ist,dadurch gekennzeichnet, dass der Bodenabschnitt der Durchkontaktierung (142) eine Dicke aufweist, die ungefähr 10- bis 50-mal größer als die Dicke der Metallleitungen (184, 186) ist.An apparatus comprising: an interlayer dielectric layer (115) formed on a first side (101) of a substrate (102); a first metallization layer formed over the interlayer dielectric layer (115), the first metallization layer, a plurality of metal lines (184, 186) formed in a first inter-metal dielectric material (182); anda via (142) formed in the substrate (102) and the interlayer dielectric (115), the via (142) comprising: a bottom portion formed of a conductive material, the bottom portion adjacent a second side (103) of the substrate (102); sidewall portions formed of the conductive material, first end portions of the sidewall portions connected to the bottom portion and second end portions of the sidewall portions connected to the metal lines (184, 186) of the first metallization layer are; anda central portion formed between the sidewall portions over the bottom portion, the central portion formed of a dielectric material, characterized in that the bottom portion of the via (142) has a thickness that is approximately 10 to 50 times greater than the thickness of the metal lines (184, 186).
Description
Hintergrundbackground
Die Halbleiterindustrie hat aufgrund fortwährender Verbesserungen der Integrationsdichte einer Vielfalt elektronischer Komponenten (z.B. Transistoren, Dioden, Widerstände, Kondensatoren, usw.) ein rasches Wachstum erfahren. Größtenteils ist diese Verbesserung der Integrationsdichte in den wiederholten Verkleinerungen der minimalen Bauteilgröße begründet, welche es erlaubt, dass mehr Komponenten in einen gegebenen Bereich integriert werden. Da das Verlangen nach noch kleineren elektronischen Bauteilen kürzlich angestiegen ist, besteht gesteigerter Bedarf nach kleineren und ausgefalleneren Packungstechniken für Halbleiterchips.The semiconductor industry has experienced rapid growth due to continuous improvements in the integration density of a variety of electronic components (e.g. transistors, diodes, resistors, capacitors, etc.). For the most part, this improvement in integration density is due to the repeated reductions in the minimum component size, which allows more components to be integrated into a given area. As the demand for even smaller electronic components has recently increased, there is an increasing need for smaller and more unusual packaging techniques for semiconductor chips.
Mit der Fortentwicklung der Halbleitertechnologien haben sich dreidimensionale integrierte Schaltkreise als eine effektive Alternative zu der weiteren Verringerung der physikalischen Abmessungen eines Halbleiterchips erwiesen. Bei einem dreidimensionalen integrierten Schaltkreis werden aktive Bereiche, wie Logik, Speicher, Prozessorschaltkreise und/oder dergleichen auf unterschiedlichen Wafern hergestellt, wobei jeder Wafer-Chip auf der Oberseite einer Verpackungskomponente unter der Verwendung von Hub- und Schwenkeinheiten aufgestapelt ist. Durch die Verwendung dreidimensionaler integrierter Schaltkreise kann eine wesentlich höhere Dichte erreicht werden. Daraus resultiert, dass dreidimensionale integrierte Schaltkreise kleinere Formfaktoren erreichen können, kosteneffizient sind sowie eine verbesserte Leistungsfähigkeit bei niedriger Leistungsaufnahme aufweisen.With the advancement of semiconductor technologies, three-dimensional integrated circuits have proven to be an effective alternative to further reducing the physical dimensions of a semiconductor chip. In a three-dimensional integrated circuit, active areas such as logic, memory, processor circuits and / or the like are produced on different wafers, each wafer chip being stacked on top of a packaging component using lifting and pivoting units. A much higher density can be achieved by using three-dimensional integrated circuits. As a result, three-dimensional integrated circuits can achieve smaller form factors, are cost-effective, and have improved performance with low power consumption.
Um elektrische Schaltkreise in dem gestapelten Halbleiter-Chip miteinander zu verbinden, werden Silizium-Durchkontaktierungen verwendet, um einen vertikalen Verbindungskanal durch den Körper des gestapelten Chips bereitzustellen. Silizium-Durchkontaktierungen können unter Verwendung geeigneter Techniken ausgebildet werden. Beispielsweise wird zur Ausbildung einer Silizium-Durchkontaktierung eine Öffnung auf einer aktiven Seite des Halbleitersubstrates ausgebildet, wobei sich die Öffnung noch tiefer als die aktiven Bereiche des Halbleitersubstrates in das Halbleitersubstrat hinein erstreckt. Diese Öffnungen können daraufhin mit einem leitfähigen Material wie Kupfer, Aluminium, Wolfram, Silber, Gold und/oder dergleichen aufgefüllt werden. Nachdem die Öffnungen aufgefüllt worden sind, kann die Rückseite des Halbleitersubstrates mit Hilfe eines Verdünnungsprozesses verdünnt werden, etwa mit Hilfe eines chemisch-mechanischen Polierprozesses oder mit Hilfe eines Ätzprozesses. Der Verdünnungsprozess wird auf die Rückseite des Substrates angewendet, bis das leitfähige Material der Silizium-Durchkontaktierung freigelegt ist.Silicon vias are used to interconnect electrical circuits in the stacked semiconductor chip to provide a vertical connection channel through the body of the stacked chip. Silicon vias can be formed using appropriate techniques. For example, an opening is formed on an active side of the semiconductor substrate in order to form a silicon plated-through hole, the opening extending even deeper than the active regions of the semiconductor substrate into the semiconductor substrate. These openings can then be filled with a conductive material such as copper, aluminum, tungsten, silver, gold and / or the like. After the openings have been filled, the back of the semiconductor substrate can be thinned using a thinning process, for example using a chemical-mechanical polishing process or using an etching process. The thinning process is applied to the back of the substrate until the conductive material of the silicon via is exposed.
Aus der
- eine dielektrische Zwischenschicht, die auf einer ersten Seite eines Substrates ausgebildet ist;
- eine erste Metallisierungsschicht, die über der dielektrischen Zwischenschicht ausgebildet ist, wobei die erste Metallisierungsschicht eine Mehrzahl Metallleitungen aufweist, die in einem ersten dielektrischen Zwischenmetallmaterial ausgebildet sind; und
- eine Durchkontaktierung, die in dem Substrat ausgebildet ist, wobei die Durchkontaktierung aufweist:
- einen Bodenabschnitt, der aus einem leitfähigen Material ausgebildet ist, wobei der Bodenabschnitt angrenzend an eine zweite Seite des Substrates ausgebildet ist;
- Seitenwandabschnitte, die aus dem leitfähigen Material ausgebildet sind, wobei erste Anschlüsse der Seitenwandabschnitte mit dem Bodenabschnitt verbunden sind, und wobei zweite Anschlüsse der Seitenwandabschnitte mit den Metallleitungen der ersten Metallisierungsschicht verbunden sind; und
- einen Mittelabschnitt, der zwischen den Seitenwandabschnitten ausgebildet ist, wobei der Mittelabschnitt aus einem dielektrischen Material ausgebildet ist.
- a dielectric interlayer formed on a first side of a substrate;
- a first metallization layer formed over the intermediate dielectric layer, the first metallization layer having a plurality of metal lines formed in a first intermediate dielectric metal material; and
- a via formed in the substrate, the via having:
- a bottom portion formed of a conductive material, the bottom portion being formed adjacent a second side of the substrate;
- Sidewall portions formed of the conductive material, first terminals of the sidewall portions connected to the bottom portion and second terminals of the sidewall portions connected to the metal lines of the first metallization layer; and
- a middle section formed between the side wall sections, the middle section being formed of a dielectric material.
Zusammenfassung der ErfindungSummary of the invention
Die vorliegende Erfindung stellt eine Vorrichtung mit einer Durchkontaktierung gemäß dem unabhängigen Anspruch 1 bereit. Die Erfindung stellt weiterhin ein Verfahren gemäß dem unabhängigen Anspruch 5 und dem unabhängigen Anspruch 8 bereit. Die vorteilhaften Weiterentwicklungen der Erfindung werden in den abhängigen Ansprüchen definiert.The present invention provides a via device according to independent claim 1. The invention further provides a method according to independent claim 5 and independent claim 8. The advantageous further developments of the invention are defined in the dependent claims.
FigurenlisteFigure list
Für ein umfassenderes Verständnis der vorliegenden Offenbarung sowie deren Vorteile wird nunmehr Bezug auf die nachstehende Beschreibung in Verbindung mit den begleitenden Figuren genommen, bei welchen:
-
1 veranschaulicht eine Querschnittsansicht eines Halbleiterbauteils gemäß einer Ausführungsform; -
2 veranschaulicht ein Halbleiterbauteil, nachdem eine Mehrzahl elektrischer Schaltkreise in dem Substrat ausgebildet worden sind, gemäß einer Ausführungsform; -
3 veranschaulicht eine Querschnittsansicht des in2 gezeigten Halbleiterbauteils, nachdem eine Öffnung in dem Substrat ausgebildet worden ist, gemäß einer Ausführungsform; -
4 veranschaulicht eine Querschnittsansicht des in3 gezeigten Halbleiterbauteils, nachdem eine Deckschicht auf den Seitenwänden sowie dem Boden der Öffnung ausgebildet worden ist, gemäß einer Ausführungsform; -
5 veranschaulicht eine Querschnittsansicht des in4 gezeigten Halbleiterbauteils, nachdem eine Sperrschicht über der Deckschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
6 veranschaulicht eine Querschnittsansicht des in5 gezeigten Halbleiterbauteils, nachdem eine Saatschicht über der Sperrschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
7 veranschaulicht eine Querschnittsansicht des in6 gezeigten Halbleiterbauteils, nachdem eine dielektrische Schicht über der Saatschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
8 veranschaulicht eine Querschnittsansicht des in7 gezeigten Halbleiterbauteils, nachdem ein Strukturierungsprozess auf die dielektrische Schicht angewendet worden ist, gemäß einer Ausführungsform; -
9 veranschaulicht eine Querschnittsansicht des in8 gezeigten Halbleiterbauteils, nachdem ein leitfähiges Material in die Öffnung eingefüllt worden ist, gemäß einer Ausführungsform; -
10 veranschaulicht eine Querschnittsansicht des in9 gezeigten Halbleiterbauteils, nachdem die verbleibende Fotolackschicht entfernt worden ist, gemäß einer Ausführungsform; -
11 veranschaulicht eine Querschnittsansicht des in10 gezeigten Halbleiterbauteils, nachdem eine dielektrische Zwischenmetallschicht abgeschieden worden ist, gemäß einer Ausführungsform; -
12 veranschaulicht eine Querschnittsansicht des in11 gezeigten Halbleiterbauteils, nachdem zwei zusätzliche Metallisierungsschichten über der ersten Metallisierungsschicht ausgebildet worden sind, gemäß einer Ausführungsform; -
13 veranschaulicht eine Querschnittsansicht des in12 gezeigten Halbleiterbauteils, nachdem eine Passivierungsschicht auf der Oberseite der dielektrischen Zwischenmetallschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
14 veranschaulicht eine Querschnittsansicht des in13 gezeigten Halbleiterbauteils, nachdem eine erste Polymerschicht auf der Oberseite der Passivierungsschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
15 veranschaulicht eine Querschnittsansicht des in14 gezeigten Halbleiterbauteils, nachdem ein Strukturierungsprozess auf die Oberseite der ersten Polymerschicht angewendet worden ist, gemäß einer Ausführungsform; -
16 veranschaulicht eine Querschnittsansicht des in15 gezeigten Halbleiterbauteils, nachdem eine Saatschicht auf der Oberseite der ersten Polymerschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
17 veranschaulicht eine Querschnittsansicht des in5 gezeigten Halbleiterbauteils, nachdem eine Umverteilungsleitung auf der Oberseite der Saatschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
18 veranschaulicht eine Querschnittsansicht des in17 gezeigten Halbleiterbauteils, nachdem eine zweite Polymerschicht über dem Halbleiterbauteil ausgebildet worden ist, gemäß einer Ausführungsform; -
19 veranschaulicht eine Querschnittsansicht des in18 gezeigten Halbleiterbauteils, nachdem ein Strukturierungsprozess auf die Oberfläche der zweiten Polymerschicht angewendet worden ist, gemäß einer Ausführungsform; -
20 veranschaulicht eine Querschnittsansicht des in19 gezeigten Halbleiterbauteils, nachdem eine UBM-Saatschicht auf der Oberseite der zweiten Polymerschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
21 veranschaulicht eine Querschnittsansicht des in20 gezeigten Halbleiterbauteils, nachdem eine zweite leitfähige Schicht auf der Oberseite der UBM-Saatschicht ausgebildet worden ist, gemäß einer Ausführungsform; -
22 veranschaulicht eine Querschnittsansicht des in21 gezeigten Halbleiterbauteils, nachdem ein Verbindungshügel auf der UBM-Struktur ausgebildet worden ist, gemäß einer Ausführungsform; -
23 ist eine Querschnittsansicht des in22 gezeigten Halbleiterbauteils, nachdem ein Verdünnungsprozess auf die zweite Seite des Substrates angewendet worden ist, gemäß einer Ausführungsform; und -
24 veranschaulicht eine Querschnittsansicht des in23 gezeigten Halbleiterbauteils, nachdem ein Rückseitenkontakt auf der zweiten Seite des Substrates ausgebildet worden ist, gemäß einer Ausführungsform.
-
1 13 illustrates a cross-sectional view of a semiconductor device according to an embodiment; -
2nd 10 illustrates a semiconductor device after a plurality of electrical circuits have been formed in the substrate, according to an embodiment; -
3rd illustrates a cross-sectional view of FIG2nd The semiconductor device shown after an opening has been formed in the substrate, according to an embodiment; -
4th illustrates a cross-sectional view of FIG3rd Semiconductor device shown, after a cover layer has been formed on the side walls and the bottom of the opening, according to an embodiment; -
5 illustrates a cross-sectional view of FIG4th The semiconductor device shown after a barrier layer has been formed over the cover layer, according to one embodiment; -
6 illustrates a cross-sectional view of FIG5 The semiconductor device shown after a seed layer has been formed over the barrier layer, according to one embodiment; -
7 illustrates a cross-sectional view of FIG6 The semiconductor device shown after a dielectric layer has been formed over the seed layer, according to one embodiment; -
8th illustrates a cross-sectional view of FIG7 The semiconductor device shown after a patterning process has been applied to the dielectric layer, according to an embodiment; -
9 illustrates a cross-sectional view of FIG8th The semiconductor device shown after a conductive material has been filled into the opening, according to an embodiment; -
10th illustrates a cross-sectional view of FIG9 The semiconductor device shown after the remaining photoresist layer has been removed, according to one embodiment; -
11 illustrates a cross-sectional view of FIG10th The semiconductor device shown after a dielectric intermetallic layer has been deposited, according to an embodiment; -
12 illustrates a cross-sectional view of FIG11 The semiconductor device shown after two additional metallization layers have been formed over the first metallization layer, according to one embodiment; -
13 illustrates a cross-sectional view of FIG12 The semiconductor device shown after a passivation layer has been formed on the top of the intermetallic dielectric layer, according to one embodiment; -
14 illustrates a cross-sectional view of FIG13 The semiconductor device shown after a first polymer layer has been formed on the top of the passivation layer, according to one embodiment; -
15 illustrates a cross-sectional view of FIG14 The semiconductor device shown after a patterning process has been applied to the top of the first polymer layer, according to an embodiment; -
16 illustrates a cross-sectional view of FIG15 The semiconductor device shown after a seed layer has been formed on the top of the first polymer layer, according to an embodiment; -
17th illustrates a cross-sectional view of FIG5 The semiconductor device shown after a redistribution line has been formed on the top of the seed layer, according to an embodiment; -
18th illustrates a cross-sectional view of FIG17th The semiconductor device shown after a second polymer layer has been formed over the semiconductor device, according to one embodiment; -
19th illustrates a cross-sectional view of FIG18th The semiconductor device shown after a patterning process has been applied to the surface of the second polymer layer, according to an embodiment; -
20th illustrates a cross-sectional view of FIG19th The semiconductor device shown after a UBM seed layer has been formed on the top of the second polymer layer, according to one embodiment; -
21st illustrates a cross-sectional view of FIG20th The semiconductor device shown after a second conductive layer has been formed on the top of the UBM seed layer, according to one embodiment; -
22 illustrates a cross-sectional view of FIG21st The semiconductor device shown after a connection bump has been formed on the UBM structure, according to an embodiment; -
23 is a cross-sectional view of the in22 The semiconductor device shown after a thinning process has been applied to the second side of the substrate, according to an embodiment; and -
24th illustrates a cross-sectional view of FIG23 Semiconductor device shown, after a back contact has been formed on the second side of the substrate, according to an embodiment.
Übereinstimmende Bezugszeichen und -symbole in den unterschiedlichen Figuren beziehen sich grundsätzlich auf entsprechende Teile, soweit nichts anderes angegeben ist. Die Figuren sind derart gezeichnet, dass sie deutlich die relevanten Aspekte der verschiedenen Ausführungsformen veranschaulichen, sie sind jedoch nicht notwendigerweise maßstabsgetreu gezeichnet.Corresponding reference numerals and symbols in the different figures generally refer to corresponding parts, unless stated otherwise. The figures are drawn to clearly illustrate the relevant aspects of the various embodiments, but are not necessarily drawn to scale.
Genaue Beschreibung der veranschaulichenden AusführungsformenDetailed description of the illustrative embodiments
Die Herstellung und die Verwendung der vorliegenden Ausführungsformen werden nachstehend im Detail diskutiert. Es sollte jedoch verstanden werden, dass die vorliegende Offenbarung eine Vielzahl anwendbarer erfindungsgemäßer Konzepte bereitstellt, welche auf einem breiten Gebiet spezifischer Zusammenhänge umgesetzt werden können. Die diskutierten, spezifischen Ausführungsformen sind lediglich veranschaulichend für spezifische Weisen, um von den Ausführungsformen der Offenbarung Nutzen zu machen, sie sollen jedoch nicht den Umfang der Offenbarung beschränken.The manufacture and use of the present embodiments are discussed in detail below. However, it should be understood that the present disclosure provides a variety of applicable inventive concepts that can be implemented in a wide range of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to benefit from the embodiments of the disclosure, but are not intended to limit the scope of the disclosure.
Die vorliegende Offenbarung wird mit Bezug auf Ausführungsformen in einem spezifischen Zusammenhang beschrieben, nämlich eine Durchkontaktierungsstruktur eines Halbleiterpaketes. Die Ausführungsformen der Offenbarung können jedoch ebenso auf eine Vielfalt von Paketen der Halbleiterindustrie angewendet werden. Im Folgenden werden verschiedene Ausführungsformen im Detail mit Bezug auf die begleitenden Figuren erklärt.The present disclosure is described with reference to embodiments in a specific context, namely a via structure of a semiconductor package. However, the embodiments of the disclosure can also be applied to a variety of packages in the semiconductor industry. Various embodiments are explained in detail below with reference to the accompanying figures.
Das Halbleiterbauteil
Wie in
Die Durchkontaktierung
Das Substrat
Das Substrat
Eine dielektrische Zwischenschicht
Die
Es sollte festgehalten werden, dass während in
Die
Die
Der MOS-Transistor
Die Isolationsbereiche
Das Gate-Dielektrikum
Die Gate-Elektrode
Der Abstandshalter
Die Drain-/Source-Bereiche
Wie in
Der Kontaktstecker
Eine leitfähige Deckschicht kann vor dem Füllen des Kontaktsteckerloches abgeschieden werden. Die leitfähige Deckschicht ist vorzugsweise konform und sie kann eine einzige Schicht aus Ta, TaN, WN, WSi, TiN, Ru und Kombinationen dieser aufweisen. Die leitfähige Deckschicht kann typischerweise als eine Sperrschicht verwendet werden, um das leitfähige Material wie Kupfer davon abzuhalten, in das darunter liegende Substrat
Die leitfähige Deckschicht kann unter Verwendung eines geeigneten Abscheideprozesses wie CVD, PVD, atomarer Schichtabscheidung (ALD) und/oder dergleichen abgeschieden werden.The conductive cover layer can be deposited using a suitable deposition process such as CVD, PVD, atomic layer deposition (ALD) and / or the like.
Ein leitfähiges Material wird dann in die Öffnung gefüllt. Das leitfähige Material kann unter Verwendung von CVD, PVD oder ALD abgeschieden werden. Das leitfähige Material wird über der leitfähigen Deckschicht abgeschieden, um die Kontaktsteckeröffnung zu füllen. Überschüssige Anteile des leitfähigen Materials werden von der Oberseite der dielektrischen Zwischenschicht
Die
Die
Die Deckschicht
Darüber hinaus kann die Deckschicht
Die
Die
Darüber hinaus kann die Saatschicht
Die
Die
Die
Wie in
Gemäß einer Ausführungsform weisen die Metallleitungen
Eine vorteilhafte Eigenschaft des Vorliegens der Metallleitungen der ersten Metallisierungsschicht sowie der Metallabschnitte der Durchkontaktierung, die während desselben Elektroplattierungsprozesses ausgebildet werden, liegt darin, dass die gesamte Produktionszeit des Halbleiterbauteils reduziert wird. Darüber hinaus wird die Durchkontaktierung teilweise mit dem leitfähigen Material gefüllt. Eine derartige, teilweise gefüllte Struktur hilft dabei, die Zeit des Elektroplattierungsprozesses herabzusetzen. Darüber hinaus wird der üblicherweise bei gewöhnlichen Herstellungsprozessen verwendete Planarisierungsprozess eingespart. Daraus folgt, dass sowohl die Kosten als auch die Produktionszeit des Halbleiterbauteils verbessert werden.An advantageous property of the presence of the metal lines of the first metallization layer and of the metal sections of the via, which are formed during the same electroplating process, is that the total production time of the semiconductor component is reduced. In addition, the via is partially filled with the conductive material. Such a partially filled structure helps to reduce the time of the electroplating process. In addition, the planarization process that is usually used in normal manufacturing processes is saved. It follows that both the cost and the production time of the semiconductor device are improved.
Eine weitere vorteilhafte Eigenschaft des mit Bezug auf
Die
Darüber hinaus können die Sperrschicht und die Saatschicht unterhalb der verbleibenden Fotolackschicht (in
Die
Eine vorteilhafte Eigenschaft einer mit einer Kombination aus einem leitfähigen Material und einem dielektrischen Material gefüllten Durchkontaktierung besteht darin, dass der dielektrische Mittelabschnitt als ein Spannungspuffer wirkt. Ein derartiger Spannungspuffer hilft dabei, die Durchkontaktierung davor zu bewahren, durch thermische oder mechanische Verspannungen während der darauffolgenden Herstellungsschritte zerstört zu werden.An advantageous property of a via filled with a combination of a conductive material and a dielectric material is that the dielectric middle section acts as a voltage buffer. Such a voltage buffer helps to prevent the plated-through hole from being destroyed by thermal or mechanical tension during the subsequent production steps.
Die
Es sollte weiterhin festgehalten werden, dass die in
Die zweite Metallleitung
Die
Wie in
Die
Die
Die
Die
Wie in
Die
Die
Die
Die
Die
Gemäß einer anderen Ausführungsform kann der Verbindungshöcker
Die
Der Verdünnungsprozess kann unter Verwendung geeigneter Technologien wie Schleifen, Polieren und/oder chemischen Ätzens oder mit Hilfe einer Kombination von Ätzen und Schleifen umgesetzt werden. Gemäß einer Ausführungsform kann der Verdünnungsprozess unter Verwendung eines CMP-Prozesses umgesetzt werden. Bei dem CMP-Prozess werden eine Kombination von Ätzmaterialien und abrasiven Materialien mit der Rückseite des Substrates in Verbindung gebracht, und ein Schleifpad (nicht dargestellt) wird dazu verwendet, um die Rückseite des Substrates
Die
Der Rückseitenkontakt
An die Ausbildung der leitfähigen Schicht kann sich ein ENIC-Prozess anschließen, um die ENIC-Schicht auszubilden. Der ENIC-Prozess kann das Reinigen der leitfähigen Schicht, das Tauchen des Substrates
Alternativ können sich an die Ausbildung der leitfähigen Schicht andere leitfähige Schichten, welche der ENIC-Schicht ähneln, anschließen. Beispielsweise kann die leitfähige Schicht eine Stromlos-Nickel-Stromlos-Palladium-Tauchgoldschicht (ENEPIG) sein, welche eine Nickelschicht, eine Palladiumschicht auf der Nickelschicht und eine Goldschicht auf der Palladiumschicht aufweist. Darüber hinaus kann die ENIC- oder die ENEPIG-Schicht durch andere ähnliche leitfähige Schichten ersetzt werden, etwa eine Stromlos-Nickel-Stromlos-PalladiumSchicht (ENEP) oder eine direkt getauchte Goldschicht (DIG) und/oder dergleichen.Alternatively, other conductive layers which are similar to the ENIC layer can follow the formation of the conductive layer. For example, the conductive layer can be an electroless nickel electroless palladium gold plating (ENEPIG), which has a nickel layer, a palladium layer on the nickel layer and a gold layer on the palladium layer. In addition, the ENIC or ENEPIG layer can be replaced by other similar conductive layers, such as an electroless nickel electroless palladium layer (ENEP) or a directly immersed gold layer (DIG) and / or the like.
Eine rückseitige Passivierungsschicht
Die rückseitige Passivierungsschicht
Claims (10)
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US9831177B2 (en) | 2017-11-28 |
DE102013103206A1 (en) | 2014-03-20 |
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US9112007B2 (en) | 2015-08-18 |
US10714423B2 (en) | 2020-07-14 |
CN103681549A (en) | 2014-03-26 |
US20140077374A1 (en) | 2014-03-20 |
CN103681549B (en) | 2017-03-01 |
US11756883B2 (en) | 2023-09-12 |
US20200343176A1 (en) | 2020-10-29 |
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